. >> not to get into markets and academics and polls but there was one poll done by cbs of independents. and uncommitted voters. that was their entire sample. after the debate. and biden won 50-31. >> woodruff: just independents. >> just uncommitted, people who were supporting a candidate but said they could switch, could leave that candidate. and so biden did-- i didn't find, i mean joe biden's default facial expression is a smile. i mean if he's irritated he smiles. he's got great teeth, i don't blame him for smiling. but if he's happy he smiles. if he-- if he is a little nervous he smiles. i didn't find it to be-- i mean he did interruption but i didn't find it to be so over the top. >> woodruff: you didn't think it took away from the substance. >> i think that you could certainly on a split screen if you would prefer it that he hadn't done it the way he did it. and there were occasionally some sounds of displeasure. but i thought at no point did paul ryan express, or manifest other than the one time he raised the question, and i thought it was perfectly appropriate on his part, wher